And here at the top of our "instant index" tonight, blueberries, shawberries and onions. Why? They are the superstars of a very big new study of women's health. This new study found eating at least three servings of blueberries and strawberries a week can reduce the risk of heart attack by 32%. And eating onions five times a week, even better, lowering the risk by 73%. And guess who's back tonight? That little red corvette. Here it is. Chevrolet rolling out the new model today, taking us back to the same car prince sang about, the one that took america by storm 60 years ago. See if you don't think this is the most exciting car in america today. Exciting then and the new corvette, also called the stingray in honor of the 60-year anniversary, of the amazing car. And, if you see something during the day you like for our "instant index," be sure to tweet it to me, @dianesawyer. But I do want to take a moment now for some very big news from our family at abc. Our own robin roberts has taken us through her bone marrow transplant journey and the watchful weeks after. But this morning, she had an exciting announcement. The last bone marrow test showed no abnormalities. Wow! The majority of the marrow is my sisters and it is healthy, praise god. And what all this means, my doctors are waiting for this information to be able to tell mel that I can begin the process of returning to the anchor chair. I'm coming all right! All right! I haven't been live on television since the end of august. My heart is beating so fast right now. Right. But you know what? It means I'm alive. It means I'm alive and I'm so grateful to be excited as am and I can't wait to get back. And I know grateful to all of you who sent her thoughts and paraders. She's going to take it step by step, but we sure hope to see her back in the "gma" studio, maybe behind the desk, sometime in february.

This transcript has been automatically generated and may not be 100% accurate.

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